|King of the Iron Islands
|Harmund III Hoare
|Harmund II Hoare
|The World of Ice & Fire (mentioned)
Hagon took the throne when his elder brother, King Harmund III Hoare, was overthrown and mutilated by the Shrike and other priest. Hagon quickly expelled the Faith of the Seven from the Iron Islands. He allowed his mother, Queen Lelia Lannister, to also be mutilated by the Shrike and then sent back to her family home, Casterly Rock. Her outraged nephew, the King of the Rock, responded by invading the Iron Islands.
Ser Aubrey Crakehall, the commander of the westermen, defeated Hagon's army on Great Wyk and captured Hoare Castle in the seventh year of fighting. Before being hanged, Hagon was mutilated as Lelia had been.
- The World of Ice & Fire, The Iron Islands: The Black Blood.